I might have been a bit unclear, but the tax I mentioned applies to the owners of the company, not the company itself. Which means that it's very hard for entrepreneurs to maintain control of their company, since they have to sell stock just to pay the taxes on their stock.

A report from The Confederation of Norwegian Enterprise (NHO) published this spring, showed that over 20.000 Norwegian business owners paid more in taxes, based on the company's valuation, than the entire revenue of said company.